Will the lack of an exhaust fan on the Corsair 460X create a postive air pressure?

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Charlie_24

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Feb 17, 2016
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What I want to know is - Will I get a positive air pressure environment with a rear exhaust fan or will the stock frontal fans create a positive air pressure environment by themselves. Also, even if the stock fans do create a positive air pressure environment by themselves is it recommended to have an exhaust fan.

Thanks :)
 
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Zerk2012
Of course it would have positive pressure all the fans are blowing in, you still need to add a rear fan blowing out to help the air flow.
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You should always have an exhaust fan mate IMO.

You can just get away without one on a low power build with integrated graphics.

Assuming that's not what you have with a 460x as the case though.

Any gaming build with a discrete GPU - 1 intake , 1 exhaust - absolute minimum.
 
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Thanks, it was a good answer but you didn't mention the air pressure which was a key part of my question.
 
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Ok,awesome. Thanks! 😀

I have currently chosen an EK-Vardar F4-120ER (2200rpm) as my exhaust, is this a good choice? :) 😛
 
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Oh! Didn't see that until you mentioned it. :lol:
 
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That fan will work very well.
 
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Pressure means almost exactly nothing. It's relatively unimportant. Air pressure at sea level is 14.7lbs/Sq.in and what you'll get in a case full of intakes is 14.701lbs/Sq.in or a case full of exhausts is 14.699lbs/Sq.in. That's basically just enough to attract/repel smoke or microparticulate dust as there's too many gaps, leaks, seals, edges, fan ports, etc to do otherwise. Airflow is the single most important consideration. Cool air in, hot air out.
If a case with just 1 fan, either intake or exhaust, showed regular cpu temps under load at 80°,the addition of just a single fan opposing will reduce temps upto @ 20°. With 2x intake, 2x exhaust, that temp could be dropped another 15° or so. Heat in a case will accumulate at the top of the case, even with top venting, the cpu fan alone creates a cyclonic action, circulating the heat passed the vents, soost doesn't escape. This is the function of exhaust fans, the vacuum created in front of the fans 'sucking' hotter air and exhausting it out.
Having nothing but intakes, all you've really done is built an oven. Having nothing but exhausts is identical as there's little airflow to actually draw from, so the fans spin but no air is actually moved.

With the 3x stock fans in front, you'll need at least 2x 120/140mm as exhaust, if you have an air cooler, I suggest a 120mm rear and a 120/140mm right at top-rear or if you have a 240/280mm liquid cooler, you are good.

Either way, you need Air Flow, not Pressure.
 
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Should I get another fan at the top as either an intake or an exhaust or is that unnecessary? 😛
 
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That EK is a good fan. For radiators. For a case fan it kinda sucks. You don't need an expensive, high static pressure fan for exhaust, a simple high cfm will work better, and try to keep rpm lower. The higher the rpm per cfm, the louder the fan. You are much better off moving 60cfm at 1000rpm than moving 60cfm at 2200rpm

Some cheaper options.
Case Fan: Gelid Solutions - FN-PX12-15 58.0 CFM 120mm Fan ($13.74 @ OutletPC)
Case Fan: Cougar - Vortex PWM 70.5 CFM 120mm Fan ($13.88 @ OutletPC)
Case Fan: Noctua - NF-S12B redux-1200 PWM 59.1 CFM 120mm Fan ($13.89 @ OutletPC)
Case Fan: CRYORIG - QF120 Performance 83.0 CFM 120mm Fan ($12.76 @ OutletPC)

 
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It works no biggie to me if it is made for a rad or not as long as it's not to loud for you it will work just fine.
Also yes positive pressure is best for a case like that with dust filters. Negative pressure would suck in dust from everywhere air can get in.
My favorite Enermax fans you can't find anymore so these are my go to fans now very good and quite.
http://www.ncixus.com/products/?usaffiliateid=1000031504&sku=108104
You can ask 10 people about fans and get 10 different answers but I really like the FD ones.
 
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Always found case fans for exhaust use much of a muchness performance wise in all honesty.
There's far less restriction on them than intakes so massively high cubic airflow is unnecessary.
Its the intakes where more consideration shod be taken when they have to drag air through both a front panel or vents & likely a filter.

I base exhausts on noise more than anything else, the fractal design are great , be quiet silent wings (not sure you can still get them) or the noctua redux.
They're my choices for exhausts fans (which you're far more likely to hear if you buy cheap)
 
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So the three stock intake fans at the front and then one at the rear and one at the top both as exhaust, right?

Why do I need the top exhaust one?

Should I get these for the two exhausts? Corsair Air Series AF120 LED White Quiet Edition High Airflow 120mm Fan - Twin Pack
 
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Well I'd rather not have an LED, I'd rather have black or RGB but I'm building on DinoPC so I have a limited choice between the fans I can choose. Is the top exhaust necessary, if so, why? Those fans are the only AF120 fans available and they only come in white LED in twin pack and I've read that it's better to have AFs as exhausts rather than SPs.
 
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Like I said mate with that much positive front intake I'd base the exhaust around noise levels rather than absolute cubic airflow.

You've never actually listed what components you're going to be running which would help.
& what CPU cooler ??

With a case like that 460x which has top vents too when you have that much front inward airflow warm air is going to get forced out of the top & rear vents even if no fans are fitted.
You should have a rear exhaust to help it along though primarily especially if you're going for a tower cooler that blows air front to back.
 
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I'd have gone the route of pushing you to build your own but in all fairness dinopc do quality builds IMO.
Just dont skimp on psu choice more than anything else from them.

The corsair tx-m is probably their only good reasonably priced PSU they do as they have a very very limited choice.

https://www.dinopc.com/computer-components/power-supply-units/corsair-cs-seriestm-modular-cs650m-650-watt-80-plusr-gold-1

Fans - pay a little extra for the ml twin pack - good fans , very quiet .
Use one & keep one as a spare if you dont want to ue both.

https://www.dinopc.com/computer-components/case-fans/corsair-ml120-120mm-pwm-premium-magnetic-levitation-fan-a-twin-pack

They're normally about £16 apiece so that is actually cheap.
 
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This is my build, I've added the ML120s, so should I have a top exhaust or not?

CPU - Intel® Core™ i7 7700K CPU (Quad Core, 4.2GHz - 4.5GHz, 8MB Cache)
CPU Overclocking - 4.8Ghz Overclock Stable on all CPU cores

Liquid CPU Cooler - Corsair Hydro Series™ H100i v2 Extreme Performance Liquid CPU Cooler

Warranty - 5 Year Bronze Warranty

RAM - Corsair Vengeance® LPX 16GB (2x8GB) DDR4 DRAM 3000MHz C15 Memory Kit - Black

Graphics Card - MSI GeForce® GTX 1080 Ti Gaming X 11G

Motherboard - ASUS ROG Maximus IX Hero (Socket-1151, 4x DDR4, ATX)

Operating System - Microsoft Windows 10 Home 64-bit EN (OEM)

Storage HDD / SSHD - Toshiba DT01ACA200 2TB 3.5" SATA III HDD

SSD - Samsung 500GB 960 EVO M.2 NVMe PCIe SSD

Case Fans - Corsair ML120 120mm PWM Premium Magnetic Levitation Fan - Twin Pack

Case - Corsair Crystal 460X RGB (No Optical Drive, ATX)

Power Supply Unit - Corsair RMx Series™ Modular RM750x — 750 Watt 80 PLUS® Gold

Monitor - ASUS ROG Swift PG279Q 27'' - 2560x1440, 165Hz, G-Sync

Mouse - Gigabyte XM300 Gaming Mouse (FREE)

Keyboard - Gigabyte Force K83 Mechanical Keyboard (FREE)

Turnaround - Dispatched within 3 working days
 
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Well this changes things mate as your going with a twin rad cooler which will take up both top mounts.

You only actually have room left for a single 120mm exhaust fan.

I would be inclined to take the system as is , drop the fans completely from the list.
Try it out , I think you'll actually manage fine without a rear exhaust with that h100i in a top mounted exhaust configuration.

Should you absolutely want a rear exhaust aswell then buy a noctua redux seperately from amazon & fit it yourself.
 
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So I shouldn't even have a rear exhaust? Why not? Other than the fans, does everything else look good? 😛
 
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Looking around mate - seeing issues with your configuration here.
A 240mm rad will not fit in the top fan mounts , it interferes with ram clearance.

Has to be fitted in the front as an intake which is essentially changing the whole appearance & airflow of that build.
 
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